Sound-operating mechanism.



SOUND OPERATING MECHANISM.

APPLICATION FILED JULY 22, 1913.

Patented June 23, 19%

COLUMBIA PLANOIJRAPH c0.. WASHINGTON. D. c,

llldllll w 3 A AENT FFfQE CHAR-LES L. METZGER, JOSEPH A. FOBSTER, ANDWILLIAM E. KUNE, OF GARLAND,

CALIFORNIA.

SOUND-OPERATING MECHANISM.

ioness.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed July 22, 1913. Serial No. 730,608.

To all whom it may concern Be it known that we, CHARLES L. lt'ln'rzonn,Josnrn A. Fonsrnn, and WILLIAM E. Kenn, citizens of the United States,residing at Oakland, in the county of Alameda and State of California,have invented certain new and useful Improvements in Sound- OperatingMechanisms, of which the following is a specification.

This invention relates to sound producing devices, for the imitation ofnatural sounds in connection with moving pictures or stage effects. i

The principal object of our invention 1s to produce a simple andeffective device for imitating the effect of engine exhaust, whichdevice formed a part of the applica tion under Ser. #704,379.

Another object of our invention is to provide improved means forthrowing the sound producing devices into operation from a distant pointso that the device may be operated by the camera operator, or from themusical instrument.

lVith the above and other objects in view as will hereinafter bedescribed, our invention comprises certain new and novel combinationsand arrangements of parts as will be fully described in the followingspecifications and more particularly pointed out in the appended claims.

In the accompanying drawings like characters of reference denote likeparts in the several views, and :Figure 1 is a view in elevation of ourimproved device showing a diagrammatic view of the control circuit usedtherewith. Fig. 2 is a view in section on the line 22 Fig. 1. Fig. 3 isa view in section on line 33 Fig. 1.

On a suitable base 1 are mounted standards 2 which serve to support ashaft 3, having thereon a belt pulley 4c. The latter is constantlydriven by a belt 5 from the belt pulley 6 on other motor 7, or othersource of power.

On the shaft 3 is a sleeve 8 from which extend the arms 9 to which areconnected magnet coils 10. Adjacent this collar there is provided acollar 11, which is insulated from the shaft 3 and adjacent parts byinsulation 12. On the adjoining standard 2 there is a block ofinsulating material 13, whereon is mounted a contact brush 14, adaptedto contact with collar 11. Binding parts 15, 16 and 17 are providedrespectively on sleeve 8, collar 11 and brush 14. One end of the magnetcoils is connected by a conductor wire 18 to the binding part 15 andthus grounded, the other end is connected with a conductor wire 19 withthe binding part- 16 and from 17 extends aconductor wire 20 which isconnected with a battery or other source of electric power 21. From theother side of this battery a wire 22 leads to a binding part 23 where itis grounded on the frame. A suitable key 2% is placed in the circuit tocontrol the operation and this key may be located at any convenientoint.

Slidably mounted on the shaft 3 is a sleeve 25 having at the endadjacent the magnets a disk 26 which forms an armature for the saidmagnets. Between the disk 26 and the magnets is interposed a leaf spring27, which normally holds the disk away from the magnet. Fixed on thesleeve 25 is a hub 28 having a plurality of radial arms 29, which varyin number according to the speed of exhaust which it is desired toimitate. Thus while we have shown two arms there may, on the same shaft,be mounted other magnets and disks having 3, 4: or more arms so that bysuccessively throwing into operation the speed of exhaust will begradually increased.

On the face of each arm is fastened a strip 30, of rough material suchas sand-paper, and this strip when the device is in operation contactssuccessively with a series of pin like points 31 mounted in a block 32.The latter is mounted on a bracket 33, which is attached to the base 1.

In the operation of this device when the key 24 is closed the magnets 10will be energized attracting the disk 26 against the cores thereof, andcause to revolve therewith, at the same time the sand-paper is pulledforward into contact with points 31 and produces a sound which imitatesthe exhaust of an engine.

While we have shown the preferred embodiment of our invention it will beunderstood that modifications in form and detail of construction may beresorted to without departing from the spirit thereof.

What we claim and wish to cover by Letters Patent, is

1. In an apparatus of the class described, a device for imitating theexhaust of a locomotive comprising a shaft, means to drive said shaft, ahub slidably and rotatably mounted on said shaft, friction producingmeans carried by said hub, coacting means adjacent the path of saidfriction producing means and adapted to engage the friction producingmeans when the hub is slid along the shaft and rotated, and means tosimultaneously move said hub along the shaft and cause the hub to rotatewith the shaft.

2. In an apparatus of the class described, a device for imitating theexhaust of a locomotive, comprising a shaft, means to drive said shaft,a hub slidably and rotatably mounted on said shaft, arms extending fromsaid hub, sand-paper strips carried by said arms, a supporting bracketadjacent the path of said arms, a block secured to said supportingbracket, and a multiplicity of pin teeth extending through said blockand normally spaced from the path of said sandpaper, and means tosimultaneously rotate said hub and move the same to bring the sand-paperinto contact with the pins during rotation.

3. In a device of the class described, a device for imitating theexhaust of a locomotive comprising a shaft, means to drive said shaft, ahub slidably and rotatably mounted on said shaft, arms extending fromsaid hub, sand-paper strips carried by said arms, a supporting bracketadjacent the path of said arms, a block secured to said supportingbracket, and a multiplicity of pin teeth extending through said blockand normally spaced slightly from the path of said sand-paper, means tosimultaneously rotate said hub and move the same to'bring the sand-paperinto contact with the pins during rotation, said means comprising anelectromagnetic clutch, and means to energize the same.

4. In an apparatus of the class described, a device for imitating theexhaust of a locomotive comprising a shaft, means to drive said shaft, ahub slidably and rotatably mounted on said shaft, friction means carriedby said hub, coacting means adjacent the path of said friction producingmeans and adapted to engage the friction producing means when the shaftis slid along the hub, magnets carried by said shaft, a collar carriedby said shaft and insulated therefrom, one end of the magnet windingbeing connected to the collar and the other end being grounded, a fixedcontact engaging said collar and adapted for connection to a sourceof'electricity, and a disk connected to said hub and constituting anarmature for said magnets.

In testimony whereof we affix our signatures in presence of twowitnesses.

CHARLES L. METZGER;

WVitnesses:

F. P. SOHRQEDER, R. M. OYARZO.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

